Some, such as `http2client` and `http2server`,
will be maintained much longer, even indefinitely.

When possible, each GODEBUG setting has an associated
[runtime/metrics](/pkg/runtime/metrics/) counter
named `/godebug/non-default-behavior/<name>:events`
that counts the number of times a particular program's
behavior has changed based on a non-default value
for that setting.
For example, when `GODEBUG=http2client=0` is set,

// GetLock tries to get a write lock on dm before the timeout elapses.
//
// If the lock is already in use, the calling go routine
// blocks until either the mutex becomes available and return success or
// more time has passed than the timeout value and return false.
func (dm *DRWMutex) GetLock(ctx context.Context, cancel context.CancelFunc, id, source string, opts Options) (locked bool) {
	isReadLock := false

   * @throws IllegalArgumentException if a valid {@link Inet4Address} can not be created
   */
  private static Inet4Address getInet4Address(byte[] bytes) {
    checkArgument(
        bytes.length == 4,
        "Byte array has invalid length for an IPv4 address: %s != 4.",
        bytes.length);

    // Given a 4-byte array, this cast should always succeed.
    return (Inet4Address) bytesToInetAddress(bytes, null);
  }

  /**

   * is complete. It does so by using daemon threads and adding a shutdown hook to wait for their
   * completion.
   *
   * <p>This method waits 120 seconds before continuing with JVM termination, even if the executor
   * has not finished its work.
   *
   * <p>This is mainly for fixed thread pools. See {@link Executors#newFixedThreadPool(int)}.
   *
   * @param executor the executor to modify to make sure it exits when the application is finished

    MinMaxPriorityQueue<Integer> mmHeap = MinMaxPriorityQueue.create();
    mmHeap.addAll(Lists.newArrayList(1, 2));
    Iterator<Integer> it = mmHeap.iterator();
    assertTrue("Iterator has reached end prematurely", it.hasNext());
    it.next();
    it.next();
    assertThrows(NoSuchElementException.class, () -> it.next());
  }

  public void testIteratorConcurrentModification() {

// no holes in it). On the other hand, the zero value of sparseDatas implies
// that the file has no data in it, which is rather odd.
//
// As an example, if the underlying raw file contains the 10-byte data:
//
//	var compactFile = "abcdefgh"
//
// And the sparse map has the following entries:
//
//	var spd sparseDatas = []sparseEntry{
//		{Offset: 2,  Length: 5},  // Data fragment for 2..6

 *       property <i>P</i>. See, for example, the definition of {@link #intersection intersection}.
 *   <li>A {@code Range} is serializable if it has no bounds, or if each bound is serializable.
 * </ul>
 *
 * <h3>Further reading</h3>
 *
 * <p>See the Guava User Guide article on <a
 * href="https://github.com/google/guava/wiki/RangesExplained">{@code Range}</a>.

   * www.google.com} is {@code google.com}.
   *
   * @throws IllegalStateException if the domain has no parent, as determined by {@link #hasParent}
   */
  public InternetDomainName parent() {
    checkState(hasParent(), "Domain '%s' has no parent", name);
    return ancestor(1);
  }

  /**

  /**
   * Test for an [EOFException] caused by mishandling of fragmented buffers in web socket
   * compression. https://github.com/square/okhttp/issues/5965
   */
  @Test fun `inflate golden value in buffer that has been fragmented`() {
    val inflater = MessageInflater(false)
    val buffer = fragmentBuffer(Buffer().write("f248cdc9c957c8cc4bcb492cc9cccf530400".decodeHex()))
    inflater.inflate(buffer)

        // per bouncycastle
        // <li>1: K(i) := PRF( KI, [i]_2 || Label || 0x00 || Context || [L]_2 ) with the counter at the very beginning
        // of the fixedInputData (The default implementation has this format)</li>
        // with the parameters
        // <li>1. KDFCounterParameters(ki, null, "Label || 0x00 || Context || [L]_2]", 8);

        // all fixed inputs go into the suffix:
        // + label